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/*
* Intel(R) Trace Hub data structures
*
* Copyright (C) 2014-2015 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#ifndef __INTEL_TH_H__
#define __INTEL_TH_H__
/* intel_th_device device types */
enum {
/* Devices that generate trace data */
INTEL_TH_SOURCE = 0,
/* Output ports (MSC, PTI) */
INTEL_TH_OUTPUT,
/* Switch, the Global Trace Hub (GTH) */
INTEL_TH_SWITCH,
};
/**
* struct intel_th_output - descriptor INTEL_TH_OUTPUT type devices
* @port: output port number, assigned by the switch
* @type: GTH_{MSU,CTP,PTI}
* @multiblock: true for multiblock output configuration
* @active: true when this output is enabled
*
* Output port descriptor, used by switch driver to tell which output
* port this output device corresponds to. Filled in at output device's
* probe time by switch::assign(). Passed from output device driver to
* switch related code to enable/disable its port.
*/
struct intel_th_output {
int port;
unsigned int type;
bool multiblock;
bool active;
};
/**
* struct intel_th_device - device on the intel_th bus
* @dev: device
* @resource: array of resources available to this device
* @num_resources: number of resources in @resource array
* @type: INTEL_TH_{SOURCE,OUTPUT,SWITCH}
* @id: device instance or -1
* @output: output descriptor for INTEL_TH_OUTPUT devices
* @name: device name to match the driver
*/
struct intel_th_device {
struct device dev;
struct resource *resource;
unsigned int num_resources;
unsigned int type;
int id;
/* INTEL_TH_OUTPUT specific */
struct intel_th_output output;
char name[];
};
#define to_intel_th_device(_d) \
container_of((_d), struct intel_th_device, dev)
/**
* intel_th_device_get_resource() - obtain @num'th resource of type @type
* @thdev: the device to search the resource for
* @type: resource type
* @num: number of the resource
*/
static inline struct resource *
intel_th_device_get_resource(struct intel_th_device *thdev, unsigned int type,
unsigned int num)
{
int i;
for (i = 0; i < thdev->num_resources; i++)
if (resource_type(&thdev->resource[i]) == type && !num--)
return &thdev->resource[i];
return NULL;
}
/**
* intel_th_output_assigned() - if an output device is assigned to a switch port
* @thdev: the output device
*
* Return: true if the device is INTEL_TH_OUTPUT *and* is assigned a port
*/
static inline bool
intel_th_output_assigned(struct intel_th_device *thdev)
{
return thdev->type == INTEL_TH_OUTPUT &&
thdev->output.port >= 0;
}
/**
* struct intel_th_driver - driver for an intel_th_device device
* @driver: generic driver
* @probe: probe method
* @remove: remove method
* @assign: match a given output type device against available outputs
* @unassign: deassociate an output type device from an output port
* @enable: enable tracing for a given output device
* @disable: disable tracing for a given output device
* @fops: file operations for device nodes
*
* Callbacks @probe and @remove are required for all device types.
* Switch device driver needs to fill in @assign, @enable and @disable
* callbacks.
*/
struct intel_th_driver {
struct device_driver driver;
int (*probe)(struct intel_th_device *thdev);
void (*remove)(struct intel_th_device *thdev);
/* switch (GTH) ops */
int (*assign)(struct intel_th_device *thdev,
struct intel_th_device *othdev);
void (*unassign)(struct intel_th_device *thdev,
struct intel_th_device *othdev);
void (*enable)(struct intel_th_device *thdev,
struct intel_th_output *output);
void (*disable)(struct intel_th_device *thdev,
struct intel_th_output *output);
/* output ops */
void (*irq)(struct intel_th_device *thdev);
int (*activate)(struct intel_th_device *thdev);
void (*deactivate)(struct intel_th_device *thdev);
/* file_operations for those who want a device node */
const struct file_operations *fops;
/* source ops */
int (*set_output)(struct intel_th_device *thdev,
unsigned int master);
};
#define to_intel_th_driver(_d) \
container_of((_d), struct intel_th_driver, driver)
static inline struct intel_th_device *
to_intel_th_hub(struct intel_th_device *thdev)
{
struct device *parent = thdev->dev.parent;
if (!parent)
return NULL;
return to_intel_th_device(parent);
}
struct intel_th *
intel_th_alloc(struct device *dev, struct resource *devres,
unsigned int ndevres, int irq);
void intel_th_free(struct intel_th *th);
int intel_th_driver_register(struct intel_th_driver *thdrv);
void intel_th_driver_unregister(struct intel_th_driver *thdrv);
int intel_th_trace_enable(struct intel_th_device *thdev);
int intel_th_trace_disable(struct intel_th_device *thdev);
int intel_th_set_output(struct intel_th_device *thdev,
unsigned int master);
enum {
TH_MMIO_CONFIG = 0,
TH_MMIO_SW = 2,
TH_MMIO_END,
};
#define TH_SUBDEVICE_MAX 6
#define TH_POSSIBLE_OUTPUTS 8
#define TH_CONFIGURABLE_MASTERS 256
#define TH_MSC_MAX 2
/**
* struct intel_th - Intel TH controller
* @dev: driver core's device
* @thdev: subdevices
* @hub: "switch" subdevice (GTH)
* @id: this Intel TH controller's device ID in the system
* @major: device node major for output devices
*/
struct intel_th {
struct device *dev;
struct intel_th_device *thdev[TH_SUBDEVICE_MAX];
struct intel_th_device *hub;
int id;
int major;
#ifdef CONFIG_INTEL_TH_DEBUG
struct dentry *dbg;
#endif
};
/*
* Register windows
*/
enum {
/* Global Trace Hub (GTH) */
REG_GTH_OFFSET = 0x0000,
REG_GTH_LENGTH = 0x2000,
/* Software Trace Hub (STH) [0x4000..0x4fff] */
REG_STH_OFFSET = 0x4000,
REG_STH_LENGTH = 0x2000,
/* Memory Storage Unit (MSU) [0xa0000..0xa1fff] */
REG_MSU_OFFSET = 0xa0000,
REG_MSU_LENGTH = 0x02000,
/* Internal MSU trace buffer [0x80000..0x9ffff] */
BUF_MSU_OFFSET = 0x80000,
BUF_MSU_LENGTH = 0x20000,
/* PTI output == same window as GTH */
REG_PTI_OFFSET = REG_GTH_OFFSET,
REG_PTI_LENGTH = REG_GTH_LENGTH,
/* DCI Handler (DCIH) == some window as MSU */
REG_DCIH_OFFSET = REG_MSU_OFFSET,
REG_DCIH_LENGTH = REG_MSU_LENGTH,
};
/*
* GTH, output ports configuration
*/
enum {
GTH_NONE = 0,
GTH_MSU, /* memory/usb */
GTH_CTP, /* Common Trace Port */
GTH_PTI = 4, /* MIPI-PTI */
};
#endif
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